Mercurial > dropbear

annotate libtommath/bn_mp_fwrite.c @ 284:eed26cff980b

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propagate from branch 'au.asn.ucc.matt.ltm.dropbear' (head 6c790cad5a7fa866ad062cb3a0c279f7ba788583) to branch 'au.asn.ucc.matt.dropbear' (head fff0894a0399405a9410ea1c6d118f342cf2aa64)
author Matt Johnston <matt@ucc.asn.au>
date Wed, 08 Mar 2006 13:23:49 +0000
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children 5ff8218bcee9
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284
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1 #include <tommath.h>
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2 #ifdef BN_MP_FWRITE_C
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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4 *
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5 * LibTomMath is a library that provides multiple-precision
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6 * integer arithmetic as well as number theoretic functionality.
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7 *
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8 * The library was designed directly after the MPI library by
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9 * Michael Fromberger but has been written from scratch with
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10 * additional optimizations in place.
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11 *
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12 * The library is free for all purposes without any express
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13 * guarantee it works.
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14 *
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15 * Tom St Denis, [email protected], http://math.libtomcrypt.org
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16 */
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17
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18 int mp_fwrite(mp_int *a, int radix, FILE *stream)
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19 {
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20 char *buf;
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21 int err, len, x;
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22
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23 if ((err = mp_radix_size(a, radix, &len)) != MP_OKAY) {
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24 return err;
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25 }
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26
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27 buf = OPT_CAST(char) XMALLOC (len);
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28 if (buf == NULL) {
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29 return MP_MEM;
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30 }
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31
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32 if ((err = mp_toradix(a, buf, radix)) != MP_OKAY) {
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33 XFREE (buf);
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34 return err;
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35 }
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36
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37 for (x = 0; x < len; x++) {
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38 if (fputc(buf[x], stream) == EOF) {
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39 XFREE (buf);
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40 return MP_VAL;
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41 }
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42 }
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43
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44 XFREE (buf);
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45 return MP_OKAY;
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46 }
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47
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48 #endif